Kenwood NXR-710 Service Manual page 93

Z
TX-RX UNIT (X57-7940-10)
SUB UNIT (RX VCO/PLL) (X58-5070-10) (B/2)
CN350
GND 1 1 GND
NC 2 2 NC
80C_2 3 3 80C_2
RXVCOA/B 4 4 RXVCOA/B
RX_CV 5 5 RX_CV
NC 6 6 NC
RXASSIST 7 7 RXASSIST
19.2MHz -->
CN200
RX_CV
C202
10p
R202 R204
10k 220k
IC200
TC75W51FK(F)
OP AMP
19.2MHz -->
VT2 -->
VT1 -->
AA
SCHEMATIC DIAGRAM
Q350
SSM6L05FU-F
R350
470k
R354
D352,355,358,359
470k
FREQUENCY
CONTROL
DC SW
L350
R352 R357 C354
0 0 10u 1000p
DC SW
Q351
SSM6L05FU-F
R351
470k
VCOA:3.3V
VCOB:0V
L365
3V
L351
R358 C355
0 10u
1000p
L366
D353,357,360,361
FREQUENCY CONTROL
SUB UNIT (RX VCO/PLL) (X58-5070-10) (A/2)
R325
0
R331
0
3V
L300 R301 R303
RX_CV
390 0
C308
0.01u
L303
C333 R327 C309
1.2u
0.01u 0 0.01u
C310
0.01u
3.27V
80C_2
DC SW
5.07V 7.93V 7.17V
Q201
R208 R214 2SC5383-T111
0 0
R216
1k
7.85V
AB
VCOA:6.94V
R361
VCOB:0V
33
C370
C380
8p
Q352
3p VCO A
Q352
VCO OSC
D355 C362 L358 MCH3914(8)-H
1SV282-F 33p 50n
L354
10u
R362
VCOA:0V
33
VCOB:6.94V
Q353
VCO OSC
C371
C381
VCO B
8p
3p
Q353
D357 C363 L359 MCH3914(8)-H
1SV282-F 22p 50n
L355
10u
R312
33
4.94V
C323 L309 C330
Q300
3p(B) 39n 4p(B)
2SC5636
BUFFER AMP
R305
R308 10
R310 1k
0
5.07V C314 1u25
C315 100p
3.24V
C316 100p
C317 0.01u
C318 100p
R311 10
25
7
GND
24
NC
8 Max_out
/OSC_AC_GND 23
9 PLL Mod_in
22
OSC
IC300
10
Clock
SKY72300-362
OSCout 21
11 /CS
VCC_SOC 20
12
Data
19
GND_OSC VCC_digital
3.24V
C320 100p
C321 100p
3.29V
DC SW
14.50V 13.87V
Q200
2SC5383-T111 R203
IC201
0
LMC7101BIM5
1 OUTPUT 5
V-
14.46V
2
V+
R205 3 4
1k INPUT+ INPUT-
OP AMP
RX ASSIST
AC
NXR-710
7.09V
CN351
GND 2 2
C378 R372 Vo 1 1
10p 0
Q354
2SC5636
BUFFER AMP
R374
0
R377
0
C332 R322 R324
10p 8.2 8.2
L310
C326 100p
L312 R313 10k
CN303
R314 4.7k FIN 1 1
R315 100 SPSCLK0 2 2
R316 10 /RXPCS_TR 3 3
R317 100 SPSD0 4 4
L313 C335 100p 33C 5 5
50C 6 6
LDR 7 7
REF 8 8
3.27V
5.07V
19.2MHz -->
RX_AST
CN201
33C
DC SW
D200
BUFFER
DA221
IC203
TC7SH126FU-F
/TXPCS 1
G
R213 SPSCLK0 L212 2
INA
10M 3
GND
R212
50C
390k
X57-794 6/8, X58-507 (A,B/2) 1/1
AD
GND
Vo R247
18
FIN R248
SPSCLK0 18
/RXPCS_TR R217 0
SPSD0 L213
33C
50C
LDR
REF C212 R220
0.01u 100
5
VCC
4 R250
oUTY
0
19.2MHz -->
VT2 -->
VT1 -->
93